import turtle

w = eval(input("请输入半径："))
turtle.penup()
turtle.goto(-w,0)
turtle.pendown()
turtle.circle(w)
turtle.circle(-w)


turtle.penup()
turtle.goto(w,0)
turtle.pendown()
turtle.circle(w)

turtle.penup()
turtle.goto(w,-w*2)
turtle.pendown()
turtle.circle(w)


turtle.done()